Material Features Of Oil Seals
Sep 03, 2021
As the name implies, the oil seal plays a role in sealing oil. The oil seals used in different mechanical equipment and industries are a bit different. The biggest difference is the material used in the oil seal. Different materials have different requirements for medium resistance and high and low temperature resistance. The followings are characteristics of the most common oil seal materials in oil seals.
The commonly used materials for oil seals are: nitrile rubber, viton, silicone rubber, acrylic rubber, polyurethane, polytetrafluoroethylene and so on. When selecting the material of the oil seal, the compatibility of the material to the working medium, the adaptability to the working temperature range, and the ability of the lip to follow the rotating shaft during high-speed rotation must be considered. Generally, the temperature of the lip of the oil seal is 20~50℃ higher than the temperature of the working medium when the oil seal is working, and attention should be paid when selecting the oil seal material.
For details, please refer to: Rubber types and characteristics.
The working range of the oil seal is related to the material used in the oil seal: -40~120℃ when the material is nitrile rubber (NBR), -30~180℃ for acrylic rubber (ACM), and -25~300℃ for viton (FKM).
